Trying in restore a laptop sounds simple NOT!!!!

I have a dell inspirion 1150 laptop. I am trying to restore the os with the dell cd. i set the bios to cd boot first and it is still not doing it. it did it sometime but not all the times. I need help please. I have researched everywhere and nothing. please give me some help.

anyway.
you don't need to boot from cd.
can you get to dos? (the command prompt?)
if not, do this:
get a win98 boot disk from here:www.bootdisk.com
start the pc with that disk
go to dos.
put the windows cd in cd drive
navigate to d:\i386 folder (if the cd drive is d
type winnt32.exe and enter
this will start install